product name

AC filament conversion relay: JZSJC2 product usage

JZSJC2 AC Filament Conversion Relay is suitable for railway signal lighting circuit. When the main filament of the 12V, 25w dual-filament signal bulb is broken, the auxiliary filament will be lit through a set of movable break contacts to realize the conversion of the main and auxiliary filaments. , And alarm through another set of contacts.

Applicable environment

a) Temperature: -40℃~+60℃;

b) Air pressure: not less than 70kPa (equivalent to 3000m above sea level);

c) Relative humidity: not more than 90% (temperature -25°C);

d) Vibration: frequency 5H2~2H2, displacement amplitude not greater than 1mm, frequency 22H2-50H2, acceleration amplitude not greater than 20m/s2;

e) There should be no harmful gas causing explosion hazard around, and dust-proof measures should be taken.

Mechanical properties

Contact gap: not less than 0.8mm;

Dynamic contact pressure: not less than 150mN;

Dynamic breaking contact pressure: not less than 150mN;

Contact uniformity error: not more than 0.1mm;

The joints are formed together: not less than 0.1mm.

Electrical characteristics

Rated current: 2.1AAC;

Working value: not more than 1.5AAC;

Release value: not less than 0.5AAC;

Contact resistance: no more than 0.052

Insulation resistance

The temperature of the relay and socket is 15C~35℃, the relative humidity is 45%~80%, and the insulation resistance should not be less than 100MΩ.

Insulation withstand voltage

Between the coil winding and other parts of the relay, the insulation withstand voltage between each contact and the contact and the ground should be able to withstand AC sine wave 50Hz, 1000V effective value voltage for 1Min, there should be no breakdown or flashover.

Product electrical life

Wei Electric implements broken wire conversion according to the lighting circuit, 15 to 20 actions per minute, and its electrical life is not less than 3*105

test method

Requirements for test satellites, meters, and power supplies

The accuracy of the measuring gauge should not be less than 0.02mm;

The accuracy of the feeler gauge should not be lower than level 2;

The measurement error of the dynamometer should not be greater than 2%;

The accuracy of the AC ammeter used for testing should not be lower than level 1;

The power supply voltage fluctuation range should not exceed 5%, the waveform is a sine wave, and the frequency is 50±1Hz.

Characteristic test

The electrical characteristics test circuit of the relay is shown in the figure below.

Work value

Gradually increase the coil current from zero until the armature is in contact with the iron core and all moving contacts are closed, and the minimum current value when the specified pressure is met.

Release value

Continue to increase the current to 2.1A, and then gradually reduce the coil current to the maximum current value when all the moving contacts are disconnected.

Installation method

The relay has two working positions, upright and side. The working positions of several points and the external dimensions after plugging into the socket are shown in the figure. The mechanical and electrical characteristics of the relay meet the requirements of the two working positions. The external dimensions of the relay are shown in the figure.

Installation method

The structure and installation dimensions of the relay socket are shown in the figure. The relay socket is fixed to the installation position with screws, and the fixed terminal of the corresponding socket is connected to the outside. Finally, the relay is inserted and fixed with screws.

Precautions

a) In order to ensure the reliable operation of the relay, the current value of the relay should not be less than 1.8A in the operating state.

b) When repairing and replacing the relay, first remove the screws that fix the relay, and then pull out the relay. Do not use excessive force to damage the relay or socket.

c) The socket of JZSJC2 AC filament conversion relay and the socket shown in T8/T2658-1995 are mutually standby.

d) Relay contact arrangement and wiring diagram are shown in the figure below.

Faults and troubleshooting methods

The work value is too large and exceeds the standard

Failure reason 1: Poor contact of the magnetic circuit.

Treatment method: adjust the contact surface of the iron core, the choke iron and the armature to make good contact.

Cause 2: The pressure of the moving and closing contact is too large.

Treatment method: reduce the pressure of the moving and closing contact when it meets the requirements of the product standard.

Cause 3: There is a foreign body at the junction of the armature and the iron.

Treatment method: Check whether there is jamming at the junction of the armature and the iron. If the jamming is found, the foreign objects should be cleaned.

The release value is too small and exceeds the standard.

Failure reason 1: The pressure of the moving and closing contact is too small.

Treatment method: increase the pressure of the moving and closing contact to increase the release value.

Cause 2: The reaction force storage fails.

Solution: Replace with new components.

There is AC magnetic vibration

Failure reason 1: The pressure of the moving and closing contact is too large. Treatment method: reduce the pressure of moving and closing contact. Fault reason 2: The short-circuit copper ring is broken or falls off. Treatment method: Replace with new components.

Cause 3: There is a foreign body between the iron core and the armature.

Treatment method: clean up foreign objects.